Can i use these coupons?

I have some coupons from those "blinkies" (SmartSource Coupon Machines) at Winn Dixie. The aren't related to Winn dixie product, just the food brands like kraft. And they dont say in the fine print anything about a specific store. So Im wondering if the company in charge of the food products just hands these out to Winn Dixie, but if I could use them at any store. Do you think they are redeemable at Walmart or SuperTarget?